Table 1.
Perinatal demographic comparisons between the general Western Australian population and the evolving Raine Study
| Western Australia | Raine Pregnancy Cohort at birth | Raine 5-year Subset | Raine 20-year Subset | Raine Fetal Growth Subset | Raine NAFLD Subset | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| n | 99,141 | 2863 | 2010 | 1213 | 1377 | 879 | ||||||
| Mothers | Reference | |||||||||||
| Age (years) | 27.7 | = | 27.5 | + | 28.4 | + | 28.8 | + | 28.2 | + | 28.8 | |
| Married (%) | 89.4% | − | 82.1% | − | 85.4% | − | 86.8% | − | 85.7% | − | 86.7% | |
| Caucasian (%) | 87.4% | + | 89.6% | + | 90.8% | + | 90.8% | + | 99.1%a | + | 99.2%a | |
| Nulliparous (%) | 39.0% | + | 48.1% | + | 46.7% | + | 47.2% | + | 47.6% | + | 48.4% | |
| Pregnancies | ||||||||||||
| Complications (%) | 30.0% | + | 38.6% | + | 37.9% | + | 37.4% | + | 38.7% | + | 46.1% | |
| Caesareans (%) | 18.9% | + | 21.1% | + | 21.7% | + | 21.4% | = | 20.2% | = | 20.4% | |
| Infants | ||||||||||||
| Birth weight (g) | 3344 | − | 3283 | − | 3315 | − | 3316 | + | 3389 | + | 3384 | |
| Birth length (cm) | 49.9 | − | 48.8 | − | 49.0 | − | 49.0 | − | 49.3 | − | 49.3 | |
| Ponderal index (kg/m3) | 26.7 | + | 27.9 | + | 28.0 | + | 27.9 | + | 28.1 | + | 28.1 | |
| Gestation (weeks) | 39.1 | = | 39.0 | = | 39.1 | = | 39.2 | + | 39.3 | + | 39.3 | |
| Nursery admissions (%) | 7.6% | + | 9.7% | + | 9.2% | = | 8.5% | = | 7.1% | = | 7.4% | |
| Socioeconomic status | ||||||||||||
| IRSD | 1022b | = | 1021 | + | 1035 | + | 1046 | + | 1035 | + | 1047 | |
aThe Raine Growth and NAFLD Subsets excluded non-Caucasian participants by design
NAFLD: Non-alcoholic fatty liver disease
IRSD: Index of Relative Socioeconomic Disadvantage. Higher value describes greater socioeconomic advantage
bThe IRSD for Western Australia includes all Western Australians within the Perth metropolitan area and not just the source population of mainly young metropolitan mothers
Significance defined as p < 0.003
+/=/–: Significant increase/no significant difference/significant decrease compared to general Western Australian population